rtc-meson-vrtc.txt

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    1 * Amlogic Virtual RTC (VRTC)
    2 
    3 This is a Linux interface to an RTC managed by firmware, hence it's
    4 virtual from a Linux perspective.  The interface is 1 register where
    5 an alarm time (in seconds) is to be written.
    6 
    7 Required properties:
    8 - compatible: should be "amlogic,meson-vrtc"
    9 - reg: physical address for the alarm register
   10 
   11 The alarm register is a simple scratch register shared between the
   12 application processors (AP) and the secure co-processor (SCP.)  When
   13 the AP suspends, the SCP will use the value of this register to
   14 program an always-on timer before going sleep. When the timer expires,
   15 the SCP will wake up and will then wake the AP.
   16 
   17 Example:
   18 
   19         vrtc: rtc@0a8 {
   20                 compatible = "amlogic,meson-vrtc";
   21                 reg = <0x0 0x000a8 0x0 0x4>;
   22         };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/rtc/rtc-meson-vrtc.txt

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/rtc/rtc-meson-vrtc.txt